<?php return array (
  0 => 
  array (
    'username' => '小明',
    'content' => '回去写作业啦',
  ),
  1 => 
  array (
    'username' => '小红',
    'content' => '回家洗澡啦',
  ),
  2 => 
  array (
    'username' => '小红',
    'content' => '回家洗澡啦',
  ),
  3 => 
  array (
    'username' => '小Y',
    'content' => '你好吗？？',
  ),
  4 => 
  array (
    'username' => '小Y',
    'content' => '你好吗？？',
  ),
  5 => 
  array (
    'username' => '小Y',
    'content' => '你好吗？？',
  ),
)?>